1735 lines
52 KiB
TypeScript
1735 lines
52 KiB
TypeScript
/*
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This file is part of TALER
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(C) 2015 GNUnet e.V.
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TALER is free software; you can redistribute it and/or modify it under the
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terms of the GNU General Public License as published by the Free Software
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Foundation; either version 3, or (at your option) any later version.
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TALER is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
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A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/>
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*/
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/**
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* High-level wallet operations that should be indepentent from the underlying
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* browser extension interface.
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* @module Wallet
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* @author Florian Dold
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*/
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import {
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AmountJson,
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Amounts,
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CoinRecord,
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CoinPaySig,
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Contract,
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CreateReserveResponse,
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Denomination,
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ExchangeHandle,
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ExchangeRecord,
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Notifier,
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PayCoinInfo,
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PreCoinRecord,
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RefreshSessionRecord,
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ReserveCreationInfo,
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ReserveRecord,
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WalletBalance,
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WalletBalanceEntry,
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WireInfo, DenominationRecord, DenominationStatus, denominationRecordFromKeys,
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} from "./types";
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import {
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HttpRequestLibrary,
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HttpResponse,
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RequestException,
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} from "./http";
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import {
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AbortTransaction,
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Index,
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JoinResult,
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QueryRoot,
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Store, JoinLeftResult,
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} from "./query";
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import {Checkable} from "./checkable";
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import {
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amountToPretty,
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canonicalizeBaseUrl,
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canonicalJson,
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deepEquals,
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flatMap,
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getTalerStampSec,
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} from "./helpers";
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import {CryptoApi} from "./cryptoApi";
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"use strict";
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export interface CoinWithDenom {
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coin: CoinRecord;
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denom: DenominationRecord;
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}
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@Checkable.Class
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export class KeysJson {
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@Checkable.List(Checkable.Value(Denomination))
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denoms: Denomination[];
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@Checkable.String
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master_public_key: string;
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@Checkable.Any
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auditors: any[];
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@Checkable.String
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list_issue_date: string;
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@Checkable.Any
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signkeys: any;
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@Checkable.String
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eddsa_pub: string;
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@Checkable.String
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eddsa_sig: string;
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static checked: (obj: any) => KeysJson;
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}
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@Checkable.Class
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export class CreateReserveRequest {
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/**
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* The initial amount for the reserve.
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*/
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@Checkable.Value(AmountJson)
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amount: AmountJson;
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/**
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* Exchange URL where the bank should create the reserve.
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*/
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@Checkable.String
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exchange: string;
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static checked: (obj: any) => CreateReserveRequest;
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}
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@Checkable.Class
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export class ConfirmReserveRequest {
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/**
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* Public key of then reserve that should be marked
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* as confirmed.
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*/
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@Checkable.String
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reservePub: string;
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static checked: (obj: any) => ConfirmReserveRequest;
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}
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@Checkable.Class
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export class OfferRecord {
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@Checkable.Value(Contract)
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contract: Contract;
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@Checkable.String
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merchant_sig: string;
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@Checkable.String
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H_contract: string;
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@Checkable.Number
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offer_time: number;
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/**
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* Serial ID when the offer is stored in the wallet DB.
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*/
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@Checkable.Optional(Checkable.Number)
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id?: number;
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static checked: (obj: any) => OfferRecord;
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}
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export interface HistoryRecord {
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type: string;
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timestamp: number;
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subjectId?: string;
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detail: any;
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level: HistoryLevel;
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}
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interface PayReq {
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coins: CoinPaySig[];
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merchant_pub: string;
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order_id: string;
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exchange: string;
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}
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interface TransactionRecord {
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contractHash: string;
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contract: Contract;
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payReq: PayReq;
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merchantSig: string;
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/**
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* The transaction isn't active anymore, it's either successfully paid
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* or refunded/aborted.
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*/
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finished: boolean;
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}
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export enum HistoryLevel {
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Trace = 1,
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Developer = 2,
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Expert = 3,
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User = 4,
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}
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export interface Badge {
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setText(s: string): void;
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setColor(c: string): void;
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startBusy(): void;
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stopBusy(): void;
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}
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export interface NonceRecord {
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priv: string;
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pub: string;
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}
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function setTimeout(f: any, t: number) {
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return chrome.extension.getBackgroundPage().setTimeout(f, t);
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}
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function isWithdrawableDenom(d: DenominationRecord) {
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const now_sec = (new Date).getTime() / 1000;
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const stamp_withdraw_sec = getTalerStampSec(d.stampExpireWithdraw);
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const stamp_start_sec = getTalerStampSec(d.stampStart);
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// Withdraw if still possible to withdraw within a minute
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if ((stamp_withdraw_sec + 60 > now_sec) && (now_sec >= stamp_start_sec)) {
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return true;
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}
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return false;
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}
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export type CoinSelectionResult = {exchangeUrl: string, cds: CoinWithDenom[]}|undefined;
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export function selectCoins(cds: CoinWithDenom[], paymentAmount: AmountJson,
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depositFeeLimit: AmountJson): CoinWithDenom[]|undefined {
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if (cds.length == 0) {
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return undefined;
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}
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// Sort by ascending deposit fee
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cds.sort((o1, o2) => Amounts.cmp(o1.denom.feeDeposit,
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o2.denom.feeDeposit));
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let currency = cds[0].denom.value.currency;
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let cdsResult: CoinWithDenom[] = [];
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let accFee: AmountJson = Amounts.getZero(currency);
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let accAmount: AmountJson = Amounts.getZero(currency);
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let isBelowFee = false;
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let coversAmount = false;
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let coversAmountWithFee = false;
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for (let i = 0; i < cds.length; i++) {
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let {coin, denom} = cds[i];
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if (coin.suspended) {
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continue;
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}
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if (coin.dirty) {
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continue;
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}
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if (Amounts.cmp(denom.feeDeposit, coin.currentAmount) >= 0) {
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continue;
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}
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cdsResult.push(cds[i]);
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accFee = Amounts.add(denom.feeDeposit, accFee).amount;
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accAmount = Amounts.add(coin.currentAmount, accAmount).amount;
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coversAmount = Amounts.cmp(accAmount, paymentAmount) >= 0;
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coversAmountWithFee = Amounts.cmp(accAmount,
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Amounts.add(paymentAmount,
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denom.feeDeposit).amount) >= 0;
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isBelowFee = Amounts.cmp(accFee, depositFeeLimit) <= 0;
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if ((coversAmount && isBelowFee) || coversAmountWithFee) {
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return cdsResult;
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}
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}
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return undefined;
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}
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/**
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* Get a list of denominations (with repetitions possible)
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* whose total value is as close as possible to the available
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* amount, but never larger.
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*/
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function getWithdrawDenomList(amountAvailable: AmountJson,
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denoms: DenominationRecord[]): DenominationRecord[] {
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let remaining = Amounts.copy(amountAvailable);
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const ds: DenominationRecord[] = [];
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denoms = denoms.filter(isWithdrawableDenom);
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denoms.sort((d1, d2) => Amounts.cmp(d2.value, d1.value));
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// This is an arbitrary number of coins
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// we can withdraw in one go. It's not clear if this limit
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// is useful ...
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for (let i = 0; i < 1000; i++) {
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let found = false;
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for (let d of denoms) {
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let cost = Amounts.add(d.value, d.feeWithdraw).amount;
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if (Amounts.cmp(remaining, cost) < 0) {
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continue;
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}
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found = true;
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remaining = Amounts.sub(remaining, cost).amount;
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ds.push(d);
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break;
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}
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if (!found) {
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break;
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}
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}
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return ds;
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}
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export namespace Stores {
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class ExchangeStore extends Store<ExchangeRecord> {
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constructor() {
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super("exchanges", {keyPath: "baseUrl"});
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}
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pubKeyIndex = new Index<string,ExchangeRecord>(this, "pubKey", "masterPublicKey");
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}
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class NonceStore extends Store<NonceRecord> {
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constructor() {
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super("nonces", {keyPath: "pub"});
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}
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}
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class CoinsStore extends Store<CoinRecord> {
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constructor() {
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super("coins", {keyPath: "coinPub"});
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}
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exchangeBaseUrlIndex = new Index<string,CoinRecord>(this, "exchangeBaseUrl", "exchangeBaseUrl");
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}
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class HistoryStore extends Store<HistoryRecord> {
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constructor() {
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super("history", {
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keyPath: "id",
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autoIncrement: true
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});
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}
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timestampIndex = new Index<number,HistoryRecord>(this, "timestamp", "timestamp");
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}
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class OffersStore extends Store<OfferRecord> {
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constructor() {
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super("offers", {
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keyPath: "id",
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autoIncrement: true
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});
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}
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}
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class TransactionsStore extends Store<TransactionRecord> {
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constructor() {
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super("transactions", {keyPath: "contractHash"});
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}
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fulfillmentUrlIndex = new Index<string,TransactionRecord>(this, "fulfillment_url", "contract.fulfillment_url");
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orderIdIndex = new Index<string,TransactionRecord>(this, "order_id", "contract.order_id");
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}
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class DenominationsStore extends Store<DenominationRecord> {
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constructor() {
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// case needed because of bug in type annotations
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super("denominations",
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{keyPath: ["exchangeBaseUrl", "denomPub"] as any as IDBKeyPath});
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}
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exchangeBaseUrlIndex = new Index<string, DenominationRecord>(this, "exchangeBaseUrl", "exchangeBaseUrl");
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denomPubIndex = new Index<string, DenominationRecord>(this, "denomPub", "denomPub");
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}
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export const exchanges: ExchangeStore = new ExchangeStore();
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export const nonces: NonceStore = new NonceStore();
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export const transactions: TransactionsStore = new TransactionsStore();
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export const reserves: Store<ReserveRecord> = new Store<ReserveRecord>("reserves", {keyPath: "reserve_pub"});
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export const coins: CoinsStore = new CoinsStore();
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export const refresh: Store<RefreshSessionRecord> = new Store<RefreshSessionRecord>("refresh", {keyPath: "meltCoinPub"});
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export const history: HistoryStore = new HistoryStore();
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export const offers: OffersStore = new OffersStore();
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export const precoins: Store<PreCoinRecord> = new Store<PreCoinRecord>("precoins", {keyPath: "coinPub"});
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export const denominations: DenominationsStore = new DenominationsStore();
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}
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export class Wallet {
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private db: IDBDatabase;
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private http: HttpRequestLibrary;
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private badge: Badge;
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private notifier: Notifier;
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public cryptoApi: CryptoApi;
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private processPreCoinConcurrent = 0;
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private processPreCoinThrottle: {[url: string]: number} = {};
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/**
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* Set of identifiers for running operations.
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*/
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private runningOperations: Set<string> = new Set();
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q(): QueryRoot {
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return new QueryRoot(this.db);
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}
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constructor(db: IDBDatabase,
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http: HttpRequestLibrary,
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badge: Badge,
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notifier: Notifier) {
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this.db = db;
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this.http = http;
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this.badge = badge;
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this.notifier = notifier;
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this.cryptoApi = new CryptoApi();
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this.resumePendingFromDb();
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}
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private startOperation(operationId: string) {
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this.runningOperations.add(operationId);
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this.badge.startBusy();
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}
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private stopOperation(operationId: string) {
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this.runningOperations.delete(operationId);
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if (this.runningOperations.size == 0) {
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this.badge.stopBusy();
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}
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}
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async updateExchanges(): Promise<void> {
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console.log("updating exchanges");
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let exchangesUrls = await this.q()
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.iter(Stores.exchanges)
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.map((e) => e.baseUrl)
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.toArray();
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for (let url of exchangesUrls) {
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this.updateExchangeFromUrl(url)
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.catch((e) => {
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console.error("updating exchange failed", e);
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});
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}
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}
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/**
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* Resume various pending operations that are pending
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* by looking at the database.
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*/
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private resumePendingFromDb(): void {
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console.log("resuming pending operations from db");
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this.q()
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.iter(Stores.reserves)
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.reduce((reserve) => {
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console.log("resuming reserve", reserve.reserve_pub);
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this.processReserve(reserve);
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});
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this.q()
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.iter(Stores.precoins)
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.reduce((preCoin) => {
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console.log("resuming precoin");
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this.processPreCoin(preCoin);
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});
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this.q()
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.iter(Stores.refresh)
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.reduce((r: RefreshSessionRecord) => {
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this.continueRefreshSession(r);
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});
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// FIXME: optimize via index
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this.q()
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.iter(Stores.coins)
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.reduce((c: CoinRecord) => {
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if (c.dirty && !c.transactionPending) {
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this.refresh(c.coinPub);
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}
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});
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}
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/**
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* Get exchanges and associated coins that are still spendable,
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* but only if the sum the coins' remaining value exceeds the payment amount.
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*/
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private async getCoinsForPayment(paymentAmount: AmountJson,
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depositFeeLimit: AmountJson,
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allowedExchanges: ExchangeHandle[]): Promise<CoinSelectionResult> {
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for (let exchangeHandle of allowedExchanges) {
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let exchange = await this.q().get(Stores.exchanges, exchangeHandle.url);
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if (!exchange) {
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console.error("db inconsistent");
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continue;
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}
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let coins: CoinRecord[] = await this.q()
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.iterIndex(Stores.coins.exchangeBaseUrlIndex,
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exchangeHandle.url)
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.toArray();
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if (!coins || coins.length == 0) {
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continue;
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}
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// Denomination of the first coin, we assume that all other
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// coins have the same currency
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let firstDenom = await this.q().get(Stores.denominations,
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[
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exchangeHandle.url,
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coins[0].denomPub
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]);
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if (!firstDenom) {
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throw Error("db inconsistent");
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}
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let currency = firstDenom.value.currency;
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let cds: CoinWithDenom[] = [];
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for (let i = 0; i < coins.length; i++) {
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let coin = coins[i];
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let denom = await this.q().get(Stores.denominations,
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[exchangeHandle.url, coin.denomPub]);
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if (!denom) {
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throw Error("db inconsistent");
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}
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if (denom.value.currency != currency) {
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console.warn(`same pubkey for different currencies at exchange ${exchange.baseUrl}`);
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continue;
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}
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if (coin.suspended) {
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continue;
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}
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if (coin.dirty) {
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continue;
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}
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if (coin.transactionPending) {
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continue;
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}
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cds.push({coin, denom});
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}
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let res = selectCoins(cds, paymentAmount, depositFeeLimit);
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if (res) {
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return {
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exchangeUrl: exchangeHandle.url,
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cds: res,
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}
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}
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}
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return undefined;
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}
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|
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/**
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* Record all information that is necessary to
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* pay for a contract in the wallet's database.
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*/
|
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private async recordConfirmPay(offer: OfferRecord,
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payCoinInfo: PayCoinInfo,
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chosenExchange: string): Promise<void> {
|
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let payReq: PayReq = {
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coins: payCoinInfo.map((x) => x.sig),
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merchant_pub: offer.contract.merchant_pub,
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order_id: offer.contract.order_id,
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exchange: chosenExchange,
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};
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let t: TransactionRecord = {
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contractHash: offer.H_contract,
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contract: offer.contract,
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payReq: payReq,
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merchantSig: offer.merchant_sig,
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finished: false,
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};
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|
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let historyEntry: HistoryRecord = {
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type: "pay",
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timestamp: (new Date).getTime(),
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subjectId: `contract-${offer.H_contract}`,
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detail: {
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merchantName: offer.contract.merchant.name,
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amount: offer.contract.amount,
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contractHash: offer.H_contract,
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fulfillmentUrl: offer.contract.fulfillment_url,
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},
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level: HistoryLevel.User
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};
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await this.q()
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.put(Stores.transactions, t)
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.put(Stores.history, historyEntry)
|
|
.putAll(Stores.coins, payCoinInfo.map((pci) => pci.updatedCoin))
|
|
.finish();
|
|
|
|
this.notifier.notify();
|
|
}
|
|
|
|
|
|
async putHistory(historyEntry: HistoryRecord): Promise<void> {
|
|
await this.q().put(Stores.history, historyEntry).finish();
|
|
this.notifier.notify();
|
|
}
|
|
|
|
|
|
async saveOffer(offer: OfferRecord): Promise<number> {
|
|
console.log(`saving offer in wallet.ts`);
|
|
let id = await this.q().putWithResult(Stores.offers, offer);
|
|
this.notifier.notify();
|
|
console.log(`saved offer with id ${id}`);
|
|
if (typeof id !== "number") {
|
|
throw Error("db schema wrong");
|
|
}
|
|
return id;
|
|
}
|
|
|
|
|
|
/**
|
|
* Add a contract to the wallet and sign coins,
|
|
* but do not send them yet.
|
|
*/
|
|
async confirmPay(offer: OfferRecord): Promise<any> {
|
|
console.log("executing confirmPay");
|
|
|
|
let transaction = await this.q().get(Stores.transactions, offer.H_contract);
|
|
|
|
if (transaction) {
|
|
// Already payed ...
|
|
return {};
|
|
}
|
|
|
|
let res = await this.getCoinsForPayment(offer.contract.amount,
|
|
offer.contract.max_fee,
|
|
offer.contract.exchanges);
|
|
|
|
console.log("max_fee", offer.contract.max_fee);
|
|
console.log("coin selection result", res);
|
|
|
|
if (!res) {
|
|
console.log("not confirming payment, insufficient coins");
|
|
return {
|
|
error: "coins-insufficient",
|
|
};
|
|
}
|
|
let {exchangeUrl, cds} = res;
|
|
|
|
let ds = await this.cryptoApi.signDeposit(offer, cds);
|
|
await this.recordConfirmPay(offer,
|
|
ds,
|
|
exchangeUrl);
|
|
return {};
|
|
}
|
|
|
|
|
|
/**
|
|
* Add a contract to the wallet and sign coins,
|
|
* but do not send them yet.
|
|
*/
|
|
async checkPay(offer: OfferRecord): Promise<any> {
|
|
// First check if we already payed for it.
|
|
let transaction = await this.q().get(Stores.transactions, offer.H_contract);
|
|
if (transaction) {
|
|
return {isPayed: true};
|
|
}
|
|
|
|
// If not already payed, check if we could pay for it.
|
|
let res = await this.getCoinsForPayment(offer.contract.amount,
|
|
offer.contract.max_fee,
|
|
offer.contract.exchanges);
|
|
|
|
if (!res) {
|
|
console.log("not confirming payment, insufficient coins");
|
|
return {
|
|
error: "coins-insufficient",
|
|
};
|
|
}
|
|
return {isPayed: false};
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieve all necessary information for looking up the contract
|
|
* with the given hash.
|
|
*/
|
|
async queryPayment(query: any): Promise<any> {
|
|
let t: TransactionRecord | undefined;
|
|
|
|
console.log("query for payment", query);
|
|
|
|
switch (query.type) {
|
|
case "fulfillment_url":
|
|
t = await this.q().getIndexed(Stores.transactions.fulfillmentUrlIndex, query.value);
|
|
break;
|
|
case "order_id":
|
|
t = await this.q().getIndexed(Stores.transactions.orderIdIndex, query.value);
|
|
break;
|
|
case "hash":
|
|
t = await this.q().get<TransactionRecord>(Stores.transactions, query.value);
|
|
break;
|
|
default:
|
|
throw Error("invalid type");
|
|
}
|
|
|
|
if (!t) {
|
|
console.log("query for payment failed");
|
|
return {
|
|
success: false,
|
|
}
|
|
}
|
|
console.log("query for payment succeeded:", t);
|
|
let resp = {
|
|
success: true,
|
|
payReq: t.payReq,
|
|
H_contract: t.contractHash,
|
|
contract: t.contract,
|
|
};
|
|
return resp;
|
|
}
|
|
|
|
|
|
/**
|
|
* First fetch information requred to withdraw from the reserve,
|
|
* then deplete the reserve, withdrawing coins until it is empty.
|
|
*/
|
|
private async processReserve(reserveRecord: ReserveRecord,
|
|
retryDelayMs: number = 250): Promise<void> {
|
|
const opId = "reserve-" + reserveRecord.reserve_pub;
|
|
this.startOperation(opId);
|
|
|
|
try {
|
|
let exchange = await this.updateExchangeFromUrl(reserveRecord.exchange_base_url);
|
|
let reserve = await this.updateReserve(reserveRecord.reserve_pub,
|
|
exchange);
|
|
let n = await this.depleteReserve(reserve, exchange);
|
|
|
|
if (n != 0) {
|
|
let depleted: HistoryRecord = {
|
|
type: "depleted-reserve",
|
|
subjectId: `reserve-progress-${reserveRecord.reserve_pub}`,
|
|
timestamp: (new Date).getTime(),
|
|
detail: {
|
|
exchangeBaseUrl: reserveRecord.exchange_base_url,
|
|
reservePub: reserveRecord.reserve_pub,
|
|
requestedAmount: reserveRecord.requested_amount,
|
|
currentAmount: reserveRecord.current_amount,
|
|
},
|
|
level: HistoryLevel.User
|
|
};
|
|
await this.q().put(Stores.history, depleted).finish();
|
|
}
|
|
} catch (e) {
|
|
// random, exponential backoff truncated at 3 minutes
|
|
let nextDelay = Math.min(2 * retryDelayMs + retryDelayMs * Math.random(),
|
|
3000 * 60);
|
|
console.warn(`Failed to deplete reserve, trying again in ${retryDelayMs} ms`);
|
|
setTimeout(() => this.processReserve(reserveRecord, nextDelay),
|
|
retryDelayMs);
|
|
} finally {
|
|
this.stopOperation(opId);
|
|
}
|
|
}
|
|
|
|
|
|
private async processPreCoin(preCoin: PreCoinRecord,
|
|
retryDelayMs = 200): Promise<void> {
|
|
if (this.processPreCoinConcurrent >= 4 || this.processPreCoinThrottle[preCoin.exchangeBaseUrl]) {
|
|
console.log("delaying processPreCoin");
|
|
setTimeout(() => this.processPreCoin(preCoin, Math.min(retryDelayMs * 2, 5 * 60 * 1000)),
|
|
retryDelayMs);
|
|
return;
|
|
}
|
|
console.log("executing processPreCoin");
|
|
this.processPreCoinConcurrent++;
|
|
try {
|
|
const exchange = await this.q().get(Stores.exchanges,
|
|
preCoin.exchangeBaseUrl);
|
|
if (!exchange) {
|
|
console.error("db inconsistend: exchange for precoin not found");
|
|
return;
|
|
}
|
|
const denom = await this.q().get(Stores.denominations,
|
|
[preCoin.exchangeBaseUrl, preCoin.denomPub]);
|
|
if (!denom) {
|
|
console.error("db inconsistent: denom for precoin not found");
|
|
return;
|
|
}
|
|
|
|
const coin = await this.withdrawExecute(preCoin);
|
|
|
|
const mutateReserve = (r: ReserveRecord) => {
|
|
|
|
console.log(`before committing coin: current ${amountToPretty(r.current_amount!)}, precoin: ${amountToPretty(
|
|
r.precoin_amount)})}`);
|
|
|
|
let x = Amounts.sub(r.precoin_amount,
|
|
preCoin.coinValue,
|
|
denom.feeWithdraw);
|
|
if (x.saturated) {
|
|
console.error("database inconsistent");
|
|
throw AbortTransaction;
|
|
}
|
|
r.precoin_amount = x.amount;
|
|
return r;
|
|
};
|
|
|
|
const historyEntry: HistoryRecord = {
|
|
type: "withdraw",
|
|
timestamp: (new Date).getTime(),
|
|
level: HistoryLevel.Expert,
|
|
detail: {
|
|
coinPub: coin.coinPub,
|
|
}
|
|
};
|
|
|
|
await this.q()
|
|
.mutate(Stores.reserves, preCoin.reservePub, mutateReserve)
|
|
.delete("precoins", coin.coinPub)
|
|
.add(Stores.coins, coin)
|
|
.add(Stores.history, historyEntry)
|
|
.finish();
|
|
|
|
this.notifier.notify();
|
|
} catch (e) {
|
|
console.error("Failed to withdraw coin from precoin, retrying in",
|
|
retryDelayMs,
|
|
"ms", e);
|
|
// exponential backoff truncated at one minute
|
|
let nextRetryDelayMs = Math.min(retryDelayMs * 2, 5 * 60 * 1000);
|
|
setTimeout(() => this.processPreCoin(preCoin, nextRetryDelayMs),
|
|
retryDelayMs);
|
|
this.processPreCoinThrottle[preCoin.exchangeBaseUrl] = (this.processPreCoinThrottle[preCoin.exchangeBaseUrl] || 0) + 1;
|
|
setTimeout(() => {this.processPreCoinThrottle[preCoin.exchangeBaseUrl]--; }, retryDelayMs);
|
|
} finally {
|
|
this.processPreCoinConcurrent--;
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Create a reserve, but do not flag it as confirmed yet.
|
|
*/
|
|
async createReserve(req: CreateReserveRequest): Promise<CreateReserveResponse> {
|
|
let keypair = await this.cryptoApi.createEddsaKeypair();
|
|
const now = (new Date).getTime();
|
|
const canonExchange = canonicalizeBaseUrl(req.exchange);
|
|
|
|
const reserveRecord: ReserveRecord = {
|
|
reserve_pub: keypair.pub,
|
|
reserve_priv: keypair.priv,
|
|
exchange_base_url: canonExchange,
|
|
created: now,
|
|
last_query: null,
|
|
current_amount: null,
|
|
requested_amount: req.amount,
|
|
confirmed: false,
|
|
precoin_amount: Amounts.getZero(req.amount.currency),
|
|
};
|
|
|
|
const historyEntry = {
|
|
type: "create-reserve",
|
|
level: HistoryLevel.Expert,
|
|
timestamp: now,
|
|
subjectId: `reserve-progress-${reserveRecord.reserve_pub}`,
|
|
detail: {
|
|
requestedAmount: req.amount,
|
|
reservePub: reserveRecord.reserve_pub,
|
|
}
|
|
};
|
|
|
|
await this.q()
|
|
.put(Stores.reserves, reserveRecord)
|
|
.put(Stores.history, historyEntry)
|
|
.finish();
|
|
|
|
let r: CreateReserveResponse = {
|
|
exchange: canonExchange,
|
|
reservePub: keypair.pub,
|
|
};
|
|
return r;
|
|
}
|
|
|
|
|
|
/**
|
|
* Mark an existing reserve as confirmed. The wallet will start trying
|
|
* to withdraw from that reserve. This may not immediately succeed,
|
|
* since the exchange might not know about the reserve yet, even though the
|
|
* bank confirmed its creation.
|
|
*
|
|
* A confirmed reserve should be shown to the user in the UI, while
|
|
* an unconfirmed reserve should be hidden.
|
|
*/
|
|
async confirmReserve(req: ConfirmReserveRequest): Promise<void> {
|
|
const now = (new Date).getTime();
|
|
let reserve: ReserveRecord|undefined = await (
|
|
this.q().get<ReserveRecord>(Stores.reserves,
|
|
req.reservePub));
|
|
if (!reserve) {
|
|
console.error("Unable to confirm reserve, not found in DB");
|
|
return;
|
|
}
|
|
console.log("reserve confirmed");
|
|
const historyEntry: HistoryRecord = {
|
|
type: "confirm-reserve",
|
|
timestamp: now,
|
|
subjectId: `reserve-progress-${reserve.reserve_pub}`,
|
|
detail: {
|
|
exchangeBaseUrl: reserve.exchange_base_url,
|
|
reservePub: req.reservePub,
|
|
requestedAmount: reserve.requested_amount,
|
|
},
|
|
level: HistoryLevel.User,
|
|
};
|
|
reserve.confirmed = true;
|
|
await this.q()
|
|
.put(Stores.reserves, reserve)
|
|
.put(Stores.history, historyEntry)
|
|
.finish();
|
|
this.notifier.notify();
|
|
|
|
this.processReserve(reserve);
|
|
}
|
|
|
|
|
|
private async withdrawExecute(pc: PreCoinRecord): Promise<CoinRecord> {
|
|
let reserve = await this.q().get<ReserveRecord>(Stores.reserves,
|
|
pc.reservePub);
|
|
|
|
if (!reserve) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
|
|
let wd: any = {};
|
|
wd.denom_pub = pc.denomPub;
|
|
wd.reserve_pub = pc.reservePub;
|
|
wd.reserve_sig = pc.withdrawSig;
|
|
wd.coin_ev = pc.coinEv;
|
|
let reqUrl = URI("reserve/withdraw").absoluteTo(reserve.exchange_base_url);
|
|
let resp = await this.http.postJson(reqUrl, wd);
|
|
|
|
|
|
if (resp.status != 200) {
|
|
throw new RequestException({
|
|
hint: "Withdrawal failed",
|
|
status: resp.status
|
|
});
|
|
}
|
|
let r = JSON.parse(resp.responseText);
|
|
let denomSig = await this.cryptoApi.rsaUnblind(r.ev_sig,
|
|
pc.blindingKey,
|
|
pc.denomPub);
|
|
let coin: CoinRecord = {
|
|
coinPub: pc.coinPub,
|
|
coinPriv: pc.coinPriv,
|
|
denomPub: pc.denomPub,
|
|
denomSig: denomSig,
|
|
currentAmount: pc.coinValue,
|
|
exchangeBaseUrl: pc.exchangeBaseUrl,
|
|
dirty: false,
|
|
transactionPending: false,
|
|
};
|
|
return coin;
|
|
}
|
|
|
|
|
|
/**
|
|
* Withdraw coins from a reserve until it is empty.
|
|
*/
|
|
private async depleteReserve(reserve: ReserveRecord,
|
|
exchange: ExchangeRecord): Promise<number> {
|
|
console.log("depleting reserve");
|
|
if (!reserve.current_amount) {
|
|
throw Error("can't withdraw when amount is unknown");
|
|
}
|
|
let currentAmount = reserve.current_amount;
|
|
if (!currentAmount) {
|
|
throw Error("can't withdraw when amount is unknown");
|
|
}
|
|
let denomsForWithdraw = await this.getVerifiedWithdrawDenomList(exchange.baseUrl,
|
|
currentAmount);
|
|
|
|
console.log(`withdrawing ${denomsForWithdraw.length} coins`);
|
|
|
|
let ps = denomsForWithdraw.map(async(denom) => {
|
|
function mutateReserve(r: ReserveRecord): ReserveRecord {
|
|
let currentAmount = r.current_amount;
|
|
if (!currentAmount) {
|
|
throw Error("can't withdraw when amount is unknown");
|
|
}
|
|
r.precoin_amount = Amounts.add(r.precoin_amount,
|
|
denom.value,
|
|
denom.feeWithdraw).amount;
|
|
let result = Amounts.sub(currentAmount,
|
|
denom.value,
|
|
denom.feeWithdraw);
|
|
if (result.saturated) {
|
|
console.error("can't create precoin, saturated");
|
|
throw AbortTransaction;
|
|
}
|
|
r.current_amount = result.amount;
|
|
|
|
console.log(`after creating precoin: current ${amountToPretty(r.current_amount)}, precoin: ${amountToPretty(
|
|
r.precoin_amount)})}`);
|
|
|
|
return r;
|
|
}
|
|
|
|
let preCoin = await this.cryptoApi
|
|
.createPreCoin(denom, reserve);
|
|
await this.q()
|
|
.put(Stores.precoins, preCoin)
|
|
.mutate(Stores.reserves, reserve.reserve_pub, mutateReserve);
|
|
await this.processPreCoin(preCoin);
|
|
});
|
|
|
|
await Promise.all(ps);
|
|
return ps.length;
|
|
}
|
|
|
|
|
|
/**
|
|
* Update the information about a reserve that is stored in the wallet
|
|
* by quering the reserve's exchange.
|
|
*/
|
|
private async updateReserve(reservePub: string,
|
|
exchange: ExchangeRecord): Promise<ReserveRecord> {
|
|
let reserve = await this.q()
|
|
.get<ReserveRecord>(Stores.reserves, reservePub);
|
|
if (!reserve) {
|
|
throw Error("reserve not in db");
|
|
}
|
|
let reqUrl = URI("reserve/status").absoluteTo(exchange.baseUrl);
|
|
reqUrl.query({'reserve_pub': reservePub});
|
|
let resp = await this.http.get(reqUrl);
|
|
if (resp.status != 200) {
|
|
throw Error();
|
|
}
|
|
let reserveInfo = JSON.parse(resp.responseText);
|
|
if (!reserveInfo) {
|
|
throw Error();
|
|
}
|
|
let oldAmount = reserve.current_amount;
|
|
let newAmount = reserveInfo.balance;
|
|
reserve.current_amount = reserveInfo.balance;
|
|
let historyEntry = {
|
|
type: "reserve-update",
|
|
timestamp: (new Date).getTime(),
|
|
subjectId: `reserve-progress-${reserve.reserve_pub}`,
|
|
detail: {
|
|
reservePub,
|
|
requestedAmount: reserve.requested_amount,
|
|
oldAmount,
|
|
newAmount
|
|
}
|
|
};
|
|
await this.q()
|
|
.put(Stores.reserves, reserve)
|
|
.finish();
|
|
this.notifier.notify();
|
|
return reserve;
|
|
}
|
|
|
|
|
|
/**
|
|
* Get the wire information for the exchange with the given base URL.
|
|
*/
|
|
async getWireInfo(exchangeBaseUrl: string): Promise<WireInfo> {
|
|
exchangeBaseUrl = canonicalizeBaseUrl(exchangeBaseUrl);
|
|
let reqUrl = URI("wire").absoluteTo(exchangeBaseUrl);
|
|
let resp = await this.http.get(reqUrl);
|
|
|
|
if (resp.status != 200) {
|
|
throw Error("/wire request failed");
|
|
}
|
|
|
|
let wiJson = JSON.parse(resp.responseText);
|
|
if (!wiJson) {
|
|
throw Error("/wire response malformed")
|
|
}
|
|
return wiJson;
|
|
}
|
|
|
|
async getPossibleDenoms(exchangeBaseUrl: string) {
|
|
return (
|
|
this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchangeBaseUrl)
|
|
.filter((d) => d.status == DenominationStatus.Unverified || d.status == DenominationStatus.VerifiedGood)
|
|
.toArray()
|
|
);
|
|
}
|
|
|
|
/**
|
|
* Get a list of denominations to withdraw from the given exchange for the
|
|
* given amount, making sure that all denominations' signatures are verified.
|
|
*
|
|
* Writes to the DB in order to record the result from verifying
|
|
* denominations.
|
|
*/
|
|
async getVerifiedWithdrawDenomList(exchangeBaseUrl: string,
|
|
amount: AmountJson): Promise<DenominationRecord[]> {
|
|
const exchange = await this.q().get(Stores.exchanges, exchangeBaseUrl);
|
|
if (!exchange) {
|
|
throw Error(`exchange ${exchangeBaseUrl} not found`);
|
|
}
|
|
|
|
const possibleDenoms = await (
|
|
this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchange.baseUrl)
|
|
.filter((d) => d.status == DenominationStatus.Unverified || d.status == DenominationStatus.VerifiedGood)
|
|
.toArray()
|
|
);
|
|
|
|
let allValid = false;
|
|
let currentPossibleDenoms = possibleDenoms;
|
|
|
|
let selectedDenoms: DenominationRecord[];
|
|
|
|
do {
|
|
allValid = true;
|
|
let nextPossibleDenoms = [];
|
|
selectedDenoms = getWithdrawDenomList(amount, possibleDenoms);
|
|
for (let denom of selectedDenoms || []) {
|
|
if (denom.status == DenominationStatus.Unverified) {
|
|
console.log(`verifying denom ${denom.denomPub.substr(0, 15)}`);
|
|
let valid = await this.cryptoApi.isValidDenom(denom,
|
|
exchange.masterPublicKey);
|
|
if (!valid) {
|
|
denom.status = DenominationStatus.VerifiedBad;
|
|
allValid = false;
|
|
} else {
|
|
denom.status = DenominationStatus.VerifiedGood;
|
|
nextPossibleDenoms.push(denom);
|
|
}
|
|
await this.q().put(Stores.denominations, denom).finish();
|
|
} else {
|
|
nextPossibleDenoms.push(denom);
|
|
}
|
|
}
|
|
currentPossibleDenoms = nextPossibleDenoms;
|
|
} while (selectedDenoms.length > 0 && !allValid);
|
|
|
|
return selectedDenoms;
|
|
}
|
|
|
|
async getReserveCreationInfo(baseUrl: string,
|
|
amount: AmountJson): Promise<ReserveCreationInfo> {
|
|
let exchangeInfo = await this.updateExchangeFromUrl(baseUrl);
|
|
|
|
let selectedDenoms = await this.getVerifiedWithdrawDenomList(baseUrl,
|
|
amount);
|
|
let acc = Amounts.getZero(amount.currency);
|
|
for (let d of selectedDenoms) {
|
|
acc = Amounts.add(acc, d.feeWithdraw).amount;
|
|
}
|
|
let actualCoinCost = selectedDenoms
|
|
.map((d: DenominationRecord) => Amounts.add(d.value,
|
|
d.feeWithdraw).amount)
|
|
.reduce((a, b) => Amounts.add(a, b).amount);
|
|
|
|
let wireInfo = await this.getWireInfo(baseUrl);
|
|
|
|
let ret: ReserveCreationInfo = {
|
|
exchangeInfo,
|
|
selectedDenoms,
|
|
wireInfo,
|
|
withdrawFee: acc,
|
|
overhead: Amounts.sub(amount, actualCoinCost).amount,
|
|
};
|
|
return ret;
|
|
}
|
|
|
|
|
|
/**
|
|
* Update or add exchange DB entry by fetching the /keys information.
|
|
* Optionally link the reserve entry to the new or existing
|
|
* exchange entry in then DB.
|
|
*/
|
|
async updateExchangeFromUrl(baseUrl: string): Promise<ExchangeRecord> {
|
|
baseUrl = canonicalizeBaseUrl(baseUrl);
|
|
let reqUrl = URI("keys").absoluteTo(baseUrl);
|
|
let resp = await this.http.get(reqUrl);
|
|
if (resp.status != 200) {
|
|
throw Error("/keys request failed");
|
|
}
|
|
let exchangeKeysJson = KeysJson.checked(JSON.parse(resp.responseText));
|
|
return this.updateExchangeFromJson(baseUrl, exchangeKeysJson);
|
|
}
|
|
|
|
|
|
private async suspendCoins(exchangeInfo: ExchangeRecord): Promise<void> {
|
|
let suspendedCoins = await (
|
|
this.q()
|
|
.iterIndex(Stores.coins.exchangeBaseUrlIndex, exchangeInfo.baseUrl)
|
|
.indexJoinLeft(Stores.denominations.exchangeBaseUrlIndex,
|
|
(e) => e.exchangeBaseUrl)
|
|
.reduce((cd: JoinLeftResult<CoinRecord,DenominationRecord>,
|
|
suspendedCoins: CoinRecord[]) => {
|
|
if ((!cd.right) || (!cd.right.isOffered)) {
|
|
return Array.prototype.concat(suspendedCoins, [cd.left]);
|
|
}
|
|
return Array.prototype.concat(suspendedCoins);
|
|
}, []));
|
|
|
|
let q = this.q();
|
|
suspendedCoins.map((c) => {
|
|
console.log("suspending coin", c);
|
|
c.suspended = true;
|
|
q.put(Stores.coins, c);
|
|
});
|
|
await q.finish();
|
|
}
|
|
|
|
|
|
private async updateExchangeFromJson(baseUrl: string,
|
|
exchangeKeysJson: KeysJson): Promise<ExchangeRecord> {
|
|
const updateTimeSec = getTalerStampSec(exchangeKeysJson.list_issue_date);
|
|
if (updateTimeSec === null) {
|
|
throw Error("invalid update time");
|
|
}
|
|
|
|
const r = await this.q().get<ExchangeRecord>(Stores.exchanges, baseUrl);
|
|
|
|
let exchangeInfo: ExchangeRecord;
|
|
|
|
if (!r) {
|
|
exchangeInfo = {
|
|
baseUrl,
|
|
lastUpdateTime: updateTimeSec,
|
|
masterPublicKey: exchangeKeysJson.master_public_key,
|
|
};
|
|
console.log("making fresh exchange");
|
|
} else {
|
|
if (updateTimeSec < r.lastUpdateTime) {
|
|
console.log("outdated /keys, not updating");
|
|
return r
|
|
}
|
|
exchangeInfo = r;
|
|
exchangeInfo.lastUpdateTime = updateTimeSec;
|
|
console.log("updating old exchange");
|
|
}
|
|
|
|
let updatedExchangeInfo = await this.updateExchangeInfo(exchangeInfo,
|
|
exchangeKeysJson);
|
|
await this.suspendCoins(updatedExchangeInfo);
|
|
|
|
await this.q()
|
|
.put(Stores.exchanges, updatedExchangeInfo)
|
|
.finish();
|
|
|
|
return updatedExchangeInfo;
|
|
}
|
|
|
|
|
|
private async updateExchangeInfo(exchangeInfo: ExchangeRecord,
|
|
newKeys: KeysJson): Promise<ExchangeRecord> {
|
|
if (exchangeInfo.masterPublicKey != newKeys.master_public_key) {
|
|
throw Error("public keys do not match");
|
|
}
|
|
|
|
const existingDenoms: {[denomPub: string]: DenominationRecord} = await (
|
|
this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchangeInfo.baseUrl)
|
|
.reduce((x: DenominationRecord,
|
|
acc: typeof existingDenoms) => (acc[x.denomPub] = x, acc),
|
|
{})
|
|
);
|
|
|
|
const newDenoms: typeof existingDenoms = {};
|
|
const newAndUnseenDenoms: typeof existingDenoms = {};
|
|
|
|
for (let d of newKeys.denoms) {
|
|
let dr = denominationRecordFromKeys(exchangeInfo.baseUrl, d);
|
|
if (!(d.denom_pub in existingDenoms)) {
|
|
newAndUnseenDenoms[dr.denomPub] = dr;
|
|
}
|
|
newDenoms[dr.denomPub] = dr;
|
|
}
|
|
|
|
for (let oldDenomPub in existingDenoms) {
|
|
if (!(oldDenomPub in newDenoms)) {
|
|
let d = existingDenoms[oldDenomPub];
|
|
d.isOffered = false;
|
|
}
|
|
}
|
|
|
|
await this.q()
|
|
.putAll(Stores.denominations,
|
|
Object.keys(newAndUnseenDenoms).map((d) => newAndUnseenDenoms[d]))
|
|
.putAll(Stores.denominations,
|
|
Object.keys(existingDenoms).map((d) => existingDenoms[d]))
|
|
.finish();
|
|
return exchangeInfo;
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrieve a mapping from currency name to the amount
|
|
* that is currenctly available for spending in the wallet.
|
|
*/
|
|
async getBalances(): Promise<WalletBalance> {
|
|
function ensureEntry(balance: WalletBalance, currency: string) {
|
|
let entry: WalletBalanceEntry|undefined = balance[currency];
|
|
let z = Amounts.getZero(currency);
|
|
if (!entry) {
|
|
balance[currency] = entry = {
|
|
available: z,
|
|
pendingIncoming: z,
|
|
pendingPayment: z,
|
|
};
|
|
}
|
|
return entry;
|
|
}
|
|
|
|
function collectBalances(c: CoinRecord, balance: WalletBalance) {
|
|
if (c.suspended) {
|
|
return balance;
|
|
}
|
|
let currency = c.currentAmount.currency;
|
|
let entry = ensureEntry(balance, currency);
|
|
entry.available = Amounts.add(entry.available, c.currentAmount).amount;
|
|
return balance;
|
|
}
|
|
|
|
function collectPendingWithdraw(r: ReserveRecord, balance: WalletBalance) {
|
|
if (!r.confirmed) {
|
|
return balance;
|
|
}
|
|
let entry = ensureEntry(balance, r.requested_amount.currency);
|
|
let amount = r.current_amount;
|
|
if (!amount) {
|
|
amount = r.requested_amount;
|
|
}
|
|
amount = Amounts.add(amount, r.precoin_amount).amount;
|
|
if (Amounts.cmp(smallestWithdraw[r.exchange_base_url], amount) < 0) {
|
|
entry.pendingIncoming = Amounts.add(entry.pendingIncoming,
|
|
amount).amount;
|
|
}
|
|
return balance;
|
|
}
|
|
|
|
function collectPendingRefresh(r: RefreshSessionRecord,
|
|
balance: WalletBalance) {
|
|
if (!r.finished) {
|
|
return balance;
|
|
}
|
|
let entry = ensureEntry(balance, r.valueWithFee.currency);
|
|
entry.pendingIncoming = Amounts.add(entry.pendingIncoming,
|
|
r.valueOutput).amount;
|
|
|
|
return balance;
|
|
}
|
|
|
|
function collectPayments(t: TransactionRecord, balance: WalletBalance) {
|
|
if (t.finished) {
|
|
return balance;
|
|
}
|
|
let entry = ensureEntry(balance, t.contract.amount.currency);
|
|
entry.pendingPayment = Amounts.add(entry.pendingPayment,
|
|
t.contract.amount).amount;
|
|
|
|
return balance;
|
|
}
|
|
|
|
function collectSmallestWithdraw(e: JoinResult<ExchangeRecord, DenominationRecord>,
|
|
sw: any) {
|
|
let min = sw[e.left.baseUrl];
|
|
let v = Amounts.add(e.right.value, e.right.feeWithdraw).amount;
|
|
if (!min) {
|
|
min = v;
|
|
} else if (Amounts.cmp(v, min) < 0) {
|
|
min = v;
|
|
}
|
|
sw[e.left.baseUrl] = min;
|
|
return sw;
|
|
}
|
|
|
|
let balance = {};
|
|
// Mapping from exchange pub to smallest
|
|
// possible amount we can withdraw
|
|
let smallestWithdraw: {[baseUrl: string]: AmountJson} = {};
|
|
|
|
smallestWithdraw = await (this.q()
|
|
.iter(Stores.exchanges)
|
|
.indexJoin(Stores.denominations.exchangeBaseUrlIndex,
|
|
(x) => x.baseUrl)
|
|
.reduce(collectSmallestWithdraw, {}));
|
|
|
|
let tx = this.q();
|
|
tx.iter(Stores.coins)
|
|
.reduce(collectBalances, balance);
|
|
tx.iter(Stores.refresh)
|
|
.reduce(collectPendingRefresh, balance);
|
|
tx.iter(Stores.reserves)
|
|
.reduce(collectPendingWithdraw, balance);
|
|
tx.iter(Stores.transactions)
|
|
.reduce(collectPayments, balance);
|
|
await tx.finish();
|
|
return balance;
|
|
|
|
}
|
|
|
|
|
|
async createRefreshSession(oldCoinPub: string): Promise<RefreshSessionRecord|undefined> {
|
|
let coin = await this.q().get<CoinRecord>(Stores.coins, oldCoinPub);
|
|
|
|
if (!coin) {
|
|
throw Error("coin not found");
|
|
}
|
|
|
|
let exchange = await this.updateExchangeFromUrl(coin.exchangeBaseUrl);
|
|
|
|
if (!exchange) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
|
|
let oldDenom = await this.q().get(Stores.denominations,
|
|
[exchange.baseUrl, coin.denomPub]);
|
|
|
|
if (!oldDenom) {
|
|
throw Error("db inconsistent");
|
|
}
|
|
|
|
let availableDenoms: DenominationRecord[] = await (
|
|
this.q()
|
|
.iterIndex(Stores.denominations.exchangeBaseUrlIndex,
|
|
exchange.baseUrl)
|
|
.toArray()
|
|
);
|
|
|
|
let availableAmount = Amounts.sub(coin.currentAmount,
|
|
oldDenom.feeRefresh).amount;
|
|
|
|
let newCoinDenoms = getWithdrawDenomList(availableAmount,
|
|
availableDenoms);
|
|
|
|
console.log("refreshing into", newCoinDenoms);
|
|
|
|
if (newCoinDenoms.length == 0) {
|
|
console.log("not refreshing, value too small");
|
|
return undefined;
|
|
}
|
|
|
|
|
|
let refreshSession: RefreshSessionRecord = await (
|
|
this.cryptoApi.createRefreshSession(exchange.baseUrl,
|
|
3,
|
|
coin,
|
|
newCoinDenoms,
|
|
oldDenom.feeRefresh));
|
|
|
|
function mutateCoin(c: CoinRecord): CoinRecord {
|
|
let r = Amounts.sub(c.currentAmount,
|
|
refreshSession.valueWithFee);
|
|
if (r.saturated) {
|
|
// Something else must have written the coin value
|
|
throw AbortTransaction;
|
|
}
|
|
c.currentAmount = r.amount;
|
|
return c;
|
|
}
|
|
|
|
await this.q()
|
|
.put(Stores.refresh, refreshSession)
|
|
.mutate(Stores.coins, coin.coinPub, mutateCoin)
|
|
.finish();
|
|
|
|
return refreshSession;
|
|
}
|
|
|
|
|
|
async refresh(oldCoinPub: string): Promise<void> {
|
|
let refreshSession: RefreshSessionRecord|undefined;
|
|
let oldSession = await this.q().get(Stores.refresh, oldCoinPub);
|
|
if (oldSession) {
|
|
refreshSession = oldSession;
|
|
} else {
|
|
refreshSession = await this.createRefreshSession(oldCoinPub);
|
|
}
|
|
if (!refreshSession) {
|
|
// refreshing not necessary
|
|
return;
|
|
}
|
|
this.continueRefreshSession(refreshSession);
|
|
}
|
|
|
|
async continueRefreshSession(refreshSession: RefreshSessionRecord) {
|
|
if (refreshSession.finished) {
|
|
return;
|
|
}
|
|
if (typeof refreshSession.norevealIndex !== "number") {
|
|
let coinPub = refreshSession.meltCoinPub;
|
|
await this.refreshMelt(refreshSession);
|
|
let r = await this.q().get<RefreshSessionRecord>(Stores.refresh, coinPub);
|
|
if (!r) {
|
|
throw Error("refresh session does not exist anymore");
|
|
}
|
|
refreshSession = r;
|
|
}
|
|
|
|
await this.refreshReveal(refreshSession);
|
|
}
|
|
|
|
|
|
async refreshMelt(refreshSession: RefreshSessionRecord): Promise<void> {
|
|
if (refreshSession.norevealIndex != undefined) {
|
|
console.error("won't melt again");
|
|
return;
|
|
}
|
|
|
|
let coin = await this.q().get<CoinRecord>(Stores.coins,
|
|
refreshSession.meltCoinPub);
|
|
if (!coin) {
|
|
console.error("can't melt coin, it does not exist");
|
|
return;
|
|
}
|
|
|
|
let reqUrl = URI("refresh/melt").absoluteTo(refreshSession.exchangeBaseUrl);
|
|
let meltCoin = {
|
|
coin_pub: coin.coinPub,
|
|
denom_pub: coin.denomPub,
|
|
denom_sig: coin.denomSig,
|
|
confirm_sig: refreshSession.confirmSig,
|
|
value_with_fee: refreshSession.valueWithFee,
|
|
};
|
|
let coinEvs = refreshSession.preCoinsForGammas.map((x) => x.map((y) => y.coinEv));
|
|
let req = {
|
|
"new_denoms": refreshSession.newDenoms,
|
|
"melt_coin": meltCoin,
|
|
"transfer_pubs": refreshSession.transferPubs,
|
|
"coin_evs": coinEvs,
|
|
};
|
|
console.log("melt request:", req);
|
|
let resp = await this.http.postJson(reqUrl, req);
|
|
|
|
console.log("melt request:", req);
|
|
console.log("melt response:", resp.responseText);
|
|
|
|
if (resp.status != 200) {
|
|
console.error(resp.responseText);
|
|
throw Error("refresh failed");
|
|
}
|
|
|
|
let respJson = JSON.parse(resp.responseText);
|
|
|
|
if (!respJson) {
|
|
throw Error("exchange responded with garbage");
|
|
}
|
|
|
|
let norevealIndex = respJson.noreveal_index;
|
|
|
|
if (typeof norevealIndex != "number") {
|
|
throw Error("invalid response");
|
|
}
|
|
|
|
refreshSession.norevealIndex = norevealIndex;
|
|
|
|
await this.q().put(Stores.refresh, refreshSession).finish();
|
|
}
|
|
|
|
|
|
async refreshReveal(refreshSession: RefreshSessionRecord): Promise<void> {
|
|
let norevealIndex = refreshSession.norevealIndex;
|
|
if (norevealIndex == undefined) {
|
|
throw Error("can't reveal without melting first");
|
|
}
|
|
let privs = Array.from(refreshSession.transferPrivs);
|
|
privs.splice(norevealIndex, 1);
|
|
|
|
let req = {
|
|
"session_hash": refreshSession.hash,
|
|
"transfer_privs": privs,
|
|
};
|
|
|
|
let reqUrl = URI("refresh/reveal")
|
|
.absoluteTo(refreshSession.exchangeBaseUrl);
|
|
console.log("reveal request:", req);
|
|
let resp = await this.http.postJson(reqUrl, req);
|
|
|
|
console.log("session:", refreshSession);
|
|
console.log("reveal response:", resp);
|
|
|
|
if (resp.status != 200) {
|
|
console.log("error: /refresh/reveal returned status " + resp.status);
|
|
return;
|
|
}
|
|
|
|
let respJson = JSON.parse(resp.responseText);
|
|
|
|
if (!respJson.ev_sigs || !Array.isArray(respJson.ev_sigs)) {
|
|
console.log("/refresh/reveal did not contain ev_sigs");
|
|
}
|
|
|
|
let exchange = await this.q().get<ExchangeRecord>(Stores.exchanges,
|
|
refreshSession.exchangeBaseUrl);
|
|
if (!exchange) {
|
|
console.error(`exchange ${refreshSession.exchangeBaseUrl} not found`);
|
|
return;
|
|
}
|
|
|
|
let coins: CoinRecord[] = [];
|
|
|
|
for (let i = 0; i < respJson.ev_sigs.length; i++) {
|
|
let denom = await (
|
|
this.q()
|
|
.get(Stores.denominations,
|
|
[
|
|
refreshSession.exchangeBaseUrl,
|
|
refreshSession.newDenoms[i]
|
|
]));
|
|
if (!denom) {
|
|
console.error("denom not found");
|
|
continue;
|
|
}
|
|
let pc = refreshSession.preCoinsForGammas[refreshSession.norevealIndex!][i];
|
|
let denomSig = await this.cryptoApi.rsaUnblind(respJson.ev_sigs[i].ev_sig,
|
|
pc.blindingKey,
|
|
denom.denomPub);
|
|
let coin: CoinRecord = {
|
|
coinPub: pc.publicKey,
|
|
coinPriv: pc.privateKey,
|
|
denomPub: denom.denomPub,
|
|
denomSig: denomSig,
|
|
currentAmount: denom.value,
|
|
exchangeBaseUrl: refreshSession.exchangeBaseUrl,
|
|
dirty: false,
|
|
transactionPending: false,
|
|
};
|
|
|
|
coins.push(coin);
|
|
}
|
|
|
|
refreshSession.finished = true;
|
|
|
|
await this.q()
|
|
.putAll(Stores.coins, coins)
|
|
.put(Stores.refresh, refreshSession)
|
|
.finish();
|
|
}
|
|
|
|
|
|
/**
|
|
* Retrive the full event history for this wallet.
|
|
*/
|
|
async getHistory(): Promise<{history: HistoryRecord[]}> {
|
|
function collect(x: any, acc: any) {
|
|
acc.push(x);
|
|
return acc;
|
|
}
|
|
|
|
let history = await (
|
|
this.q()
|
|
.iterIndex(Stores.history.timestampIndex)
|
|
.reduce(collect, []));
|
|
|
|
return {history};
|
|
}
|
|
|
|
async getDenoms(exchangeUrl: string): Promise<DenominationRecord[]> {
|
|
let denoms = await this.q().iterIndex(Stores.denominations.exchangeBaseUrlIndex, exchangeUrl).toArray();
|
|
return denoms;
|
|
}
|
|
|
|
async getOffer(offerId: number): Promise<any> {
|
|
let offer = await this.q() .get(Stores.offers, offerId);
|
|
return offer;
|
|
}
|
|
|
|
async getExchanges(): Promise<ExchangeRecord[]> {
|
|
return this.q()
|
|
.iter<ExchangeRecord>(Stores.exchanges)
|
|
.flatMap((e) => [e])
|
|
.toArray();
|
|
}
|
|
|
|
async getReserves(exchangeBaseUrl: string): Promise<ReserveRecord[]> {
|
|
return this.q()
|
|
.iter<ReserveRecord>(Stores.reserves)
|
|
.filter((r: ReserveRecord) => r.exchange_base_url === exchangeBaseUrl)
|
|
.toArray();
|
|
}
|
|
|
|
async getCoins(exchangeBaseUrl: string): Promise<CoinRecord[]> {
|
|
return this.q()
|
|
.iter<CoinRecord>(Stores.coins)
|
|
.filter((c: CoinRecord) => c.exchangeBaseUrl === exchangeBaseUrl)
|
|
.toArray();
|
|
}
|
|
|
|
async getPreCoins(exchangeBaseUrl: string): Promise<PreCoinRecord[]> {
|
|
return this.q()
|
|
.iter<PreCoinRecord>(Stores.precoins)
|
|
.filter((c: PreCoinRecord) => c.exchangeBaseUrl === exchangeBaseUrl)
|
|
.toArray();
|
|
}
|
|
|
|
async hashContract(contract: Contract): Promise<string> {
|
|
return this.cryptoApi.hashString(canonicalJson(contract));
|
|
}
|
|
|
|
|
|
/**
|
|
* Generate a nonce in form of an EdDSA public key.
|
|
* Store the private key in our DB, so we can prove ownership.
|
|
*/
|
|
async generateNonce(): Promise<string> {
|
|
let {priv, pub} = await this.cryptoApi.createEddsaKeypair();
|
|
await this.q()
|
|
.put(Stores.nonces, {priv, pub})
|
|
.finish();
|
|
return pub;
|
|
}
|
|
|
|
|
|
async paymentSucceeded(contractHash: string): Promise<any> {
|
|
const doPaymentSucceeded = async() => {
|
|
let t = await this.q().get<TransactionRecord>(Stores.transactions,
|
|
contractHash);
|
|
if (!t) {
|
|
console.error("contract not found");
|
|
return;
|
|
}
|
|
t.finished = true;
|
|
let modifiedCoins: CoinRecord[] = [];
|
|
for (let pc of t.payReq.coins) {
|
|
let c = await this.q().get<CoinRecord>(Stores.coins, pc.coin_pub);
|
|
if (!c) {
|
|
console.error("coin not found");
|
|
return;
|
|
}
|
|
c.transactionPending = false;
|
|
modifiedCoins.push(c);
|
|
}
|
|
|
|
await this.q()
|
|
.putAll(Stores.coins, modifiedCoins)
|
|
.put(Stores.transactions, t)
|
|
.finish();
|
|
for (let c of t.payReq.coins) {
|
|
this.refresh(c.coin_pub);
|
|
}
|
|
};
|
|
doPaymentSucceeded();
|
|
return;
|
|
}
|
|
}
|